Automatic lathe attachment.



Nu. 649,902. Patented May 22, I900.

J. P. BROPHY. AUTOMATIC LATHE ATTACHMENT.

(Application filed July 17, 1899.} (N 0 M o d 81.)

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No. 649,9U2. Patented May 22, I900.

.1. P. BROPHY. AUTOMATIC LATHE-ATTACHMENT.

(Application filed July 17, 1899.)

(No Model.)

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No. 649,902. Patented May 2 2, I900.

J. P. BRUPHY.

AUTOMATIC LATHE ATTACHMENT.

(Application filed July 17, 1899.) (No Model.) 3 Sheets-Sheet 3.

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RT Qrtrrrrn STATES PATENT OFFICE.

JOHN P. BROPIlY, OF CLEVELAND, OHIO, ASSIGNOR TO THE CLEVELAND MACHINESCREV COMPANY, OF SAME PLACE.

AUTOMATIC LATHE ATTACHNI ENT.

SPECIFICATION forming part of Letters latent No. 649,902, dated May 22,1900. Application filed July17, 1899. Serial No. 724,089. (No. model.)

To all whom it nmg cancer/1.:

3e it known that I, JOHN P. BROPH'Y, a citizen of the United States, anda resident of Cleveland, county of Cuyahoga, and State of Ohio, haveinvented a new and useful Improvement in Automatic Lathe Attachments, ofwhich the following is a specification, the principle of the inventionbeing herein explained and the best mode in which I have contemplatedapplying that principle so as to distinguish it from other inventions.

My invention relates to attachments for automatic lathes for performingspecial operations upon the work in connection with other operations tobe performed upon the same work by the different tools in the revolvingturret before removing said work from the head-stock of the lathe; andit consists of means for counterboring wheels and other objects uponwhich it is required to perform such counterboring operation.

The annexed drawings and the following description set forth in detailcertainmeclr anism embodying the invention, such disclosed meansconstituting but one of various mechanical forms in which the principleof the invention may be used.

In said annexed drawings, Figure I represents a front elevation of aportion of an automatic lathe to which my invention has been attached,showing a cross-section of a wheel in the act of being counterboredsecured to the clutch in the head-stock of the latter, the tool-holderbeing shown in longitudinal crosssection on the cross-slide, showing thetool and other portions in elevation therein, together with otherportions of the lathe shown. Fig. II represents a side elevation of theparts shown in Fig. I, illustrating the relation of the parts during theoperation of the tool upon the work; and Fig. Ill represents a top planof same, showing in dotted lines a retracted position of the turret.

The turret A is intermittently rotated and advanced toward the work heldand rotated by suitable rotating blank-gripping means C by suitablemechanism in use in machines of this character and has secured in one ofthe tool-holding devices an angle-piece a, provided with an adjustablescrew 0/. The axis of rotation of the turret is made parallel with thatof the axis of rotation of the blank-gripping means and lies indifferent planes parallel with the direct-ion of reciprocation of thecross-slide. The cross-slide Bis also advanced toward the work by meansof suitable mechanism. Formed upon said cross-slide isa toolholder B,having a longitudinal tool-seat I), in which slides thecounterboringtool I). Said tool is provided with a pin 72 Fig. I, projecting downwardly through a slot 12 and which engages a plunger 0*,seated in a bore 6 drilled from the end of the tool-holder parallel withthe tool-seat b. Intermediately of the inner end of the plunger and theinner end of the bore is a spring I), which tends to move the tooltoward the turret, the move ment produced thereby being limited by meansof a screw b projecting into a slot 11 formed in the lower portion ofthe plunger. Said slot b is of a length such that the cutting edge ofthe tool is caused to normally be located intermediately of the plane ofthat face of the work adjacent to the turret and the turret, as shown inFig. I. The tool is thus enabled to pass and take up a position oppositeits point of entrance into the work for the boring operation, as shownin Fig. I. The mechanism is so timed and arranged that when thecross-slide has reached the end of its inward stroke such positionbrings the tool opposite its point of entrance into the work. Thereuponthe turret advances, after having been revolved to bring the end of theadjusting-screw a on the angle-piece into a position such that a linedrawn through the center of said end and the center of the ad jacenttool end will be parallel with the line of reciprocating travel of theturret. The tool is thus engaged by said screw and fed into the work,thus performing the counterboring operation, upon completion of whichthe turret returns and permits the spring to retract the tool. The slideis thereupon withdrawn, as shown in Fig. III, carrying the tool withoutthe path of other tools on the turret which might be required to operatein the same location.

By making the engaging piece a of angular construction it is seen thatthe time of reciprocation of the cross-slide may be altered without thenecessity of changing the time of advance of the turret, and'by changingthe angular position of the angle-piece its proper engagement with thecutting-tool still be obtained. This construction hence permits of awider range of adj ustability of the attachment than would be obtainedif the contactpiece were incapable of angular change and perfectengagement of the tool and anglepiece may always be had. The axes of theturret and gripping means being in different planes, as above described,such adjustment is made possible.

Other modes of applying the principle of my invention may be employedinstead of the one explained, change being made as regards the mechanismherein disclosed, provided the means covered by either of the followingclaims be employed.

I therefore particularly point out and distinotly claim as myinvention 1. In an automatic lathe, the combination of rotatableblank-gripping means, a turret having its axis of rotation parallel withthe axis of rotation of said gripping means, and a cutting-tool, saidturret provided with an an gularly-ad j ustable contact-piece forengaging said tool whereby the latter may be advanced toward saidgripping means, substantially as set forth.

2. In an automatic lathe, the combination of a rotatable turret,rotatable blank-gripping means,and a reciprocable cross-slide providedwith a cutting-tool, the axes of rotation of the turret being paralleland located in different planes parallel with the direction ofreciprocation of said slide, said turret provided with means forengaging said cutting-tool whereby the latter may be advanced towardsaid gripping means, substantially as set forth.

Signed by me this 5th day-of July, 1899. J. P. BROPHY. Attest:

D. T. DAvIEs, A. E. MERKEL.

